CODEWITHSUNDEEP
cmakefile
dnaiel
dnaiel

Reputation: 447

Make not producing new executable if one is already present

I have the following makefile:

CC=gcc
CFLAGS=-std=c89

driver: driver
    $(CC) -o driver driver.c

clean:
    rm -f driver

Running make produces the driver executable. Now, if I modify the driver.c file and run
make again it does compile the new .c file but doesn't replace the one already there
Is that an expected behavior, or am I missing something here?

Upvotes: 0

Views: 34

Answers (1)

Eric Postpischil
Eric Postpischil

Reputation: 222941

driver: driver says driver depends on itself. That is not correct. You want driver: driver.c to say driver depends on driver.c.

(And that is fine for a very simple project with one executable that depends on one source files. In more complex projects, you will want executables to depend on object files and possibly other types of files and will want object files to depend on source files and possibly headers and possibly other files.)

Upvotes: 4

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